Rectangle L M N O is rotated about point M 180 degrees counter-clockwise to form rectangle L prime M prime N prime O prime. Rectangle L prime M prime N prime O prime is reflected across the line of reflection w to form L double-prime M double-prime N double-prime O double-prime.
Which composition of transformations would map LMNO to L''M'N''O''?

RM,90° ◦ RN',180°
RM,180° ◦ RN',90°
rw ◦ RM,180°
RM,180° ◦ rw